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High-Performance Cathode of Sodium-Ion Batteries Enabled by a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2.
ACS Appl Mater Interfaces. 2020 Apr 01; 12(13):15313-15319.AA

Abstract

Sodium-ion batteries (SIBs) are promising candidates for large-scale electric energy storage with abundant sodium resources. However, their development is challenged by the availability of satisfactory cathode materials with stable framework to accommodate the transportation of large-sized Na+ (1.02 Å), whose continuous insertion/extraction can easily cause irreversible volumetric deformation in the crystalline material, leading to inevitable structural failure and capacity fading. Here, different from the previous synthesis efforts targeting at Na+ containing compounds, we unveil the possibility of achieving a highly reversible sodiation/desodiation process by resorting to a K+-based layered metal oxide formulated as K0.5Mn0.7Fe0.2Ti0.1O2 (KMFT), which is a P2 type in structure with a wide interlayer spacing to sit K+ (1.38 Å). We demonstrate that an initial K+/Na+ exchange can introduce Na+ into the lattice while a small amount of K+ remains inside, which plays a significant role in ensuring enlarged channels for a fast and stable Na+ diffusion. The KMFT electrode delivers a high initial discharge capacity of 147.1 mA h g-1 at 10 mA g-1 and outstanding long cycling stability with capacity retention of 71.5% after 1000 cycles at 500 mA g-1. These results provide a new design strategy for the development of stable SIBs cathodes to facilitate their future applications.

Authors+Show Affiliations

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China. University of Chinese Academy of Sciences, Beijing 100049, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China. University of Chinese Academy of Sciences, Beijing 100049, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China. University of Chinese Academy of Sciences, Beijing 100049, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China. University of Chinese Academy of Sciences, Beijing 100049, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China. University of Chinese Academy of Sciences, Beijing 100049, P.R. China.CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, P.R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32155043

Citation

Xu, Yan-Song, et al. "High-Performance Cathode of Sodium-Ion Batteries Enabled By a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2." ACS Applied Materials & Interfaces, vol. 12, no. 13, 2020, pp. 15313-15319.
Xu YS, Gao JC, Tao XS, et al. High-Performance Cathode of Sodium-Ion Batteries Enabled by a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2. ACS Appl Mater Interfaces. 2020;12(13):15313-15319.
Xu, Y. S., Gao, J. C., Tao, X. S., Sun, Y. G., Liu, Y., Cao, A. M., & Wan, L. J. (2020). High-Performance Cathode of Sodium-Ion Batteries Enabled by a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2. ACS Applied Materials & Interfaces, 12(13), 15313-15319. https://doi.org/10.1021/acsami.0c02157
Xu YS, et al. High-Performance Cathode of Sodium-Ion Batteries Enabled By a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2. ACS Appl Mater Interfaces. 2020 Apr 1;12(13):15313-15319. PubMed PMID: 32155043.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High-Performance Cathode of Sodium-Ion Batteries Enabled by a Potassium-Containing Framework of K0.5Mn0.7Fe0.2Ti0.1O2. AU - Xu,Yan-Song, AU - Gao,Jing-Chi, AU - Tao,Xian-Sen, AU - Sun,Yong-Gang, AU - Liu,Yuan, AU - Cao,An-Min, AU - Wan,Li-Jun, Y1 - 2020/03/19/ PY - 2020/3/11/pubmed PY - 2020/3/11/medline PY - 2020/3/11/entrez KW - K+/Na+ exchange KW - layered oxide cathodes KW - potassium-ion batteries KW - reversible phase transition KW - sodium-ion batteries KW - structural control SP - 15313 EP - 15319 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 12 IS - 13 N2 - Sodium-ion batteries (SIBs) are promising candidates for large-scale electric energy storage with abundant sodium resources. However, their development is challenged by the availability of satisfactory cathode materials with stable framework to accommodate the transportation of large-sized Na+ (1.02 Å), whose continuous insertion/extraction can easily cause irreversible volumetric deformation in the crystalline material, leading to inevitable structural failure and capacity fading. Here, different from the previous synthesis efforts targeting at Na+ containing compounds, we unveil the possibility of achieving a highly reversible sodiation/desodiation process by resorting to a K+-based layered metal oxide formulated as K0.5Mn0.7Fe0.2Ti0.1O2 (KMFT), which is a P2 type in structure with a wide interlayer spacing to sit K+ (1.38 Å). We demonstrate that an initial K+/Na+ exchange can introduce Na+ into the lattice while a small amount of K+ remains inside, which plays a significant role in ensuring enlarged channels for a fast and stable Na+ diffusion. The KMFT electrode delivers a high initial discharge capacity of 147.1 mA h g-1 at 10 mA g-1 and outstanding long cycling stability with capacity retention of 71.5% after 1000 cycles at 500 mA g-1. These results provide a new design strategy for the development of stable SIBs cathodes to facilitate their future applications. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/32155043/High_Performance_Cathode_of_Sodium_Ion_Batteries_Enabled_by_a_Potassium_Containing_Framework_of_K0_5Mn0_7Fe0_2Ti0_1O2_ L2 - https://dx.doi.org/10.1021/acsami.0c02157 DB - PRIME DP - Unbound Medicine ER -
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